3-D coupled CFD model of a periodic operation of a heating flue and coke ovens in a coke oven battery

Numerical study of air staging in a coke oven heating system

“…Hence, to simplify the numerical investigation, the value of the heat transferred through the heating walls was assumed to be an average value from the entire coking process. The value of 5000 W/m 2 was estimated and successfully validated in the authors' previous work on the coupled model of the heating system (Smolka et al 2016). As a result of such an assumption, the numerical prediction of a typical amount of NO emitted over the entire cycle of coke oven furnace operation can be employed.…”

“…The required temperature of the coke in the centre of the coking chamber at the end of the coking cycle is approximately 1273 K. Thus, the temperature of the flue gases should be in the range of 1673 K to 1873 K. To increase the thermal efficiency of the entire process, the enthalpy of hot flue gases is employed to heat the COG and air to combustion using a ceramic regenerator. Additional details of the heating system installed in the coke oven plant can be found in the works of Smolka et al (2014) and Smolka et al (2016).…”

“…where j is the turbulent kinetic energy, l is the dynamic viscosity, Pr is the Prandtl number, e is the dissipation rate of the turbulent kinetic energy and C e1 and C e2 are the model constants. This model was compared with other two-equation models offered in commercial software in the previous works of Smolka et al (2014) and Smolka et al (2016) and successfully validated. -Species transport.…”

“…The model was first formulated and subsequently experimentally validated in a transient coupled form. The model includes two coke ovens and a heating flue as a representative domain of the entire coke oven battery (Smolka et al 2016). For this study, the model of the heating flue was used only as described in the work of Smolka et al (2014).…”

Optimization of Thermal Parameters of the Coke Oven Battery by Modified Methodology of Temperature Measurement in Heating Flues as the Management Tool in the Cokemaking Industry

“…), is still different at each point. Computer simulations using computational fluid dynamics (CFD) of the gas combustion process inside the PWR-63 battery heating flue (with internal exhaust gas recirculation) have shown that difference of exhaust gas temperature along its height (even with uniformly distributed, unrealistic heat reception) can reach several dozen degrees, regardless of the adopted conditions for heating media supply (with the exception of the excess air coefficient, which slightly influences on this distribution) [8]. In addition, as noted by Huhn [9], due to the diversified density and humidity distribution of the coal blend in the chamber, the heat receiving conditions in different zones of the chamber (along the length and height of the coal charge) are different.…”